Prefabricated temporary house steel structure system

Abstract

The present application relates to the technical field of temporary housing, in particular to a kind of prefabricated temporary housing steel structure system, mainly solve the technical problems that existing temporary housing steel structure system has transportation difficulty, interlayer structure is complex, disassembly is limited and overall rigidity is insufficient.A kind of prefabricated temporary housing steel structure system includes multilayer housing steel structure, by splitting the housing steel structure of each layer into upper general unit, lower general unit with complementary function, interface adaptation, modularization, and auxiliary with gusset unit to form stable single-story housing steel structure, then realize the expansion of multilayer housing steel structure through standardized interlayer interface, and meet the load bearing, force transmission, assembly, turnover demand at the same time, avoid the redundancy of traditional whole box type movable square transportation and the problem of repeated setting of floor and floor when multilayer stacking, also ensure load bearing, stress, also realize convenient assembly and disassembly and improve the reusability.

Description

Technical Field

[0001] This invention relates to the field of temporary housing technology, specifically to a prefabricated steel structure system for temporary housing. Background Technology

[0002] With the rapid development of prefabricated buildings and emergency support facilities, the steel structure system of temporary housing needs to strike a balance between "rapid erection - multiple turnovers - modular transportation". The current mainstream practices are mainly container houses and light steel keel quick-assembly houses. Container houses rely on full container transportation and hoisting, resulting in high empty-running rates, high costs for cross-regional transfers, and the repeated installation of floor slabs and floors when stacked between layers, leading to loss of net height and material waste. Although light steel keel quick-assembly houses are easy to cut and assemble on-site, the connections mostly use self-tapping screws or on-site welding, which has strong construction dependence, high difficulty in deformation and corrosion prevention, poor quality consistency, and time-consuming and labor-intensive on-site disassembly and assembly, as well as limited reusability. In addition, even when high-strength bolts are used for connection, temporary connections are often made with "external nuts + through holes", which limits assembly space, makes alignment difficult, and accumulates large tolerances, thus restricting rapid assembly and disassembly and large-scale turnover.

[0003] Existing technologies also include simple frames spliced ​​from common profiles such as channel steel. However, from the perspective of stress and stability, since they are mostly simplified structures with open sections and overlapping plates, the out-of-plane stiffness of the nodes and the overall lateral stiffness are insufficient. They are suitable for small house structures but not for multi-story structures used as temporary residential buildings. At the same time, in the combination of multi-story buildings, in order to ensure the continuity of stress, they are often stacked by "floor slab to floor" or secondary connectors are added, which leads to complex vertical inter-story structures, increased weight, and increased material and construction costs. Summary of the Invention

[0004] In order to solve the technical problems of existing temporary building steel structure systems, such as transportation difficulties, complex inter-layer structures, limited disassembly and assembly, and insufficient overall rigidity, this invention provides a new prefabricated temporary building steel structure system.

[0005] This invention is achieved using the following technical solution:

[0006] A prefabricated temporary building steel structure system includes a multi-story building steel structure. Each floor of the building steel structure includes an upper general unit, four lower general units, and four corner bracing units. The upper general units, lower general units, and corner bracing units are all prefabricated in advance.

[0007] Each upper general-purpose unit includes a rectangular floor slab, four short angle steel columns, four channel steel beams, four upper connecting angle steels, and four upper connecting plates. The four channel steel beams are welded to the four end faces of the floor slab, with their openings all facing the floor slab. The four short angle steel columns are located between two adjacent channel steel beams, with their openings all facing the floor slab. The four upper connecting angle steels are welded to the upper ends of the four short angle steel columns, so that each upper connecting angle steel and the upper end of the corresponding short angle steel column form an upper rectangular cylinder. Each channel steel beam... The ends of the steel beams are all welded to the corresponding outer walls of the upper connecting angle steel. The top opening of each upper rectangular cylinder is blocked by a rectangular sealing plate. The upper surface of the rectangular sealing plate is aligned with the top surface of the channel steel beam to form a connecting corner. The top surface of each connecting corner is welded with an upper connecting plate. Each upper connecting plate is provided with a second upper internal thread hole. Both ends of the lower flange of each channel steel beam are provided with a third upper internal thread hole. The bottom end of each short angle steel column is blocked by an upper triangular sealing plate. Each upper triangular sealing plate is provided with a first upper internal thread hole.

[0008] Each lower universal unit includes a long angle steel column and a lower connecting angle steel. The bottom end of each long angle steel column is welded with a lower connecting plate that is compatible with the upper connecting plate. Each lower connecting plate is provided with a second lower internal thread hole corresponding to the second upper internal thread hole. The lower connecting angle steel is welded to the upper end of the long angle steel column so that the lower connecting angle steel and the upper end of the long angle steel column form a lower rectangular cylinder. The top opening of each lower connecting angle steel is blocked by a lower triangular sealing plate that is compatible with the upper triangular sealing plate. Each lower triangular sealing plate is provided with a first lower internal thread hole corresponding to the first upper internal thread hole. Each lower connecting angle steel is provided with a fourth upper internal thread hole on both side plates.

[0009] Each corner brace unit includes a diagonal brace angle steel. The two ends of the diagonal brace angle steel are respectively fixed with a top horizontal connecting plate and a bottom vertical connecting plate. The top horizontal connecting plate is provided with a third lower internal thread hole corresponding to the third upper internal thread hole, and the bottom vertical connecting plate is provided with a fourth lower internal thread hole corresponding to the fourth upper internal thread hole.

[0010] The four lower universal units of the steel structure of each floor are located below the four corners of the corresponding upper universal units. The four upper triangular sealing plates correspond to the four lower triangular sealing plates. The upper universal units and the four lower universal units are fixedly connected by the first high-strength bolts and the corresponding first upper internal threaded holes and first lower internal threaded holes. The four corner bracing units of the steel structure of each floor are arranged between the lower flanges of two opposite channel steel beams and the four lower connecting angle steels. The length arrangement direction of the two opposite channel steel beams is parallel to the long side of the floor slab. The top horizontal connecting plate of the corner bracing unit is fixed to the channel steel beam by the third high-strength bolts and the corresponding third upper internal threaded holes and third lower internal threaded holes. The bottom vertical connecting plate of the corner bracing unit is fixed to the corresponding lower connecting angle steel by the fourth high-strength bolts and the fourth upper internal threaded holes and fourth lower internal threaded holes. The lower connecting plate of the upper floor steel structure corresponds to the upper connecting plate of the adjacent lower floor steel structure. The steel structures of the two adjacent floors are fixedly connected by the second high-strength bolts and the second upper internal threaded holes and second lower internal threaded holes.

[0011] Principle Explanation: 1) In the critical connection area between the short angle steel column and the channel steel beam, additional upper connecting angle steel and rectangular sealing plates are used to form a closed rectangular section between the short angle steel column and the upper connecting angle steel. This transforms the original open joint, which is prone to warping, eccentricity, and is sensitive to assembly errors, into a closed joint with local high stiffness, shorter force transmission path, and more uniform stress distribution. 2) Upper and lower connecting plates with internally threaded load-bearing interfaces are installed between the steel structures of two adjacent floors. These are fixed with a second set of high-strength bolts to form a standard inter-story interface. This allows vertical pressure and inter-story shear force to be directly transmitted through the column end node area, instead of relying on the continuous stress distribution between the floor slab and the floor layer, thus simplifying the process. 3) Streamline the inter-layer structure, reduce redundant floor slabs, reduce self-weight, and improve the utilization rate of net space; 4) Construct a unit-level triangular stability system through corner bracing units to improve lateral stability during the assembly and use stages; 5) Divide the steel structure of each floor into three standardized units: upper general unit, lower general unit, and corner bracing unit. This facilitates transportation. When in use, the upper general unit, lower general unit, and corner bracing unit are prefabricated in the factory in advance. Then, multiple prefabricated upper general units, multiple lower general units, and multiple corner bracing units are transported to the site. Finally, the upper general unit, multiple lower general units, and corner bracing units are assembled with high-strength bolts to complete the construction of the temporary building steel structure system.

[0012] Furthermore, an upper universal unit is added below the lower universal unit of the bottom-level building steel structure. The lower connecting plate of the bottom-level building structure and the upper connecting plate of the added upper universal unit are fixed together by a second high-strength bolt fitted with a second upper internal threaded hole and a second lower internal threaded hole. The addition of the upper universal unit serves as the base plate of the bottom-level building steel structure, improving the overall stability of the temporary building steel structure.

[0013] Furthermore, the floor slab includes an upper cement fiberboard, a lower cement fiberboard, and multiple cold-formed rectangular tubes arranged side by side along the length direction. The two ends of each cold-formed rectangular tube are fixed to the inner side of the web of two oppositely arranged channel steel beams. The upper cement fiberboard is fixed to the upper part of the multiple cold-formed rectangular tubes, and the lower cement fiberboard is located at the lower part of the multiple cold-formed rectangular tubes. The four end faces of the lower cement fiberboard are fixed to the inner side of the web of four channel steel beams, thus specifying and standardizing the floor slab structure.

[0014] The beneficial effects of this invention are as follows: 1) The temporary building steel structure system of this invention, by dividing the steel structure of each floor into functionally complementary, interface-adaptive, and modular upper and lower universal units, and supplementing them with corner bracing units to form a stable single-story steel structure, and then realizing the expansion of multi-story steel structures through standardized inter-story interfaces, simultaneously meets the requirements of load-bearing, force transmission, assembly, and turnover. It avoids the problems of redundant transportation of traditional integrated container houses and the repeated setting of floor slabs and floors when stacking multiple layers, and also ensures load-bearing capacity and stress resistance, while also achieving convenient assembly and disassembly and improving reusability; 2) This invention addresses the problems of insufficient out-of-plane stiffness, poor torsional resistance, easy warping, and sensitivity to hole position errors in open profile nodes by locally closing the openings, so that the stress area of ​​the node is changed from open to closed. 3) During assembly, multiple connection parts use internal threaded holes and high-strength bolts, eliminating the need for external nuts. This transforms the double-sided collaborative operation into a single-sided locking operation, which is particularly suitable for multi-story temporary buildings, narrow assembly spaces, and batch turnover scenarios, thus improving construction efficiency. 4) An upper and lower connecting plate with an internal threaded load-bearing interface is set between the steel structures of two adjacent floors, and a second high-strength bolt is used to fix them to form a standard interface between floors. This allows vertical pressure and inter-floor shear force to be directly transmitted through the column end node area, instead of relying on the overlapping of floor slabs and floors for continuous stress, thereby simplifying the inter-floor structure, reducing redundant floor slabs, reducing self-weight, and improving the utilization rate of net space. 5) The overall structural components mainly use angle steel and channel steel profiles, which are easy to obtain and have low manufacturing costs. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the prefabricated temporary building steel structure system described in this invention;

[0018] Figure 2 This is a structural schematic diagram of the single-story steel structure system described in this invention;

[0019] Figure 3 for Figure 2 An explosion diagram;

[0020] Figure 4 This is a schematic diagram of the structure of the general-purpose unit.

[0021] Figure 5 for Figure 4 An explosion diagram;

[0022] Figure 6 This is a schematic diagram of the assembly structure of a short angle steel column, an upper connecting angle steel, a rectangular end plate, and an upper triangular end plate;

[0023] Figure 7 This is a schematic diagram of the structure of the general unit below;

[0024] Figure 8 for Figure 7 An explosion diagram;

[0025] Figure 9 This is a structural schematic diagram of a corner brace unit;

[0026] Figure 10 This is a structural diagram of the floor slab.

[0027] In the diagram: 1-Upper general unit, 11-Floor slab, 110-Upper cement fiberboard, 111-Lower cement fiberboard, 112-Cold-formed rectangular tube, 12-Short angle steel column, 13-Channel steel beam, 14-Upper connecting angle steel, 15-Upper connecting plate, 16-Rectangular sealing plate, 17-Upper triangular sealing plate, 2-Lower general unit, 21-Long angle steel column, 22-Lower connecting angle steel, 23-Lower connecting plate, 24-Lower triangular sealing plate, 3-Corner brace unit, 31-Diagonal brace angle steel, 32-Top horizontal connecting plate, 33-Bottom vertical connecting plate. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0030] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] like Figure 1 , 2 As shown in Figures 1 and 3, a prefabricated temporary building steel structure system includes a multi-story building steel structure. Each floor of the building steel structure includes an upper general unit 1, four lower general units 2 and four corner bracing units 3. The upper general units 1, lower general units 2 and corner bracing units 3 are all prefabricated in advance.

[0032] like Figure 4 , 5 As shown in Figures 6 and 7, each upper general-purpose unit 1 includes a rectangular floor slab 11, four short angle steel columns 12, four channel steel beams 13, four upper connecting angle steels 14, and four upper connecting plates 15. The four channel steel beams 13 are respectively welded to the four end faces of the floor slab 11, and their openings are all arranged facing the floor slab 11. The four short angle steel columns 12 are respectively located between two adjacent channel steel beams 13, and the openings of the four short angle steel columns 12 are all arranged facing the floor slab 11. The four upper connecting angle steels 14 are respectively welded to the upper ends of the four short angle steel columns 12, so that each upper connecting angle steel 14 and the upper end of the corresponding short angle steel column 12 form an upper connecting plate. The rectangular cylinder has each channel steel beam 13 end welded to the corresponding outer wall of the corresponding upper connecting angle steel 14. The top opening of each upper rectangular cylinder is blocked by a rectangular sealing plate 16. The upper surface of the rectangular sealing plate 16 is aligned with the top surface of the channel steel beam 13 to form a connecting corner. Each connecting corner is welded with an upper connecting plate 15. Each upper connecting plate 15 is provided with a second upper internal thread hole. Both ends of the lower flange of each channel steel beam 13 are provided with a third upper internal thread hole. The bottom end of each short angle steel column 12 is blocked by an upper triangular sealing plate 17. Each upper triangular sealing plate 17 is provided with a first upper internal thread hole.

[0033] like Figure 7 , 8As shown, each lower general unit 2 includes a long angle steel column 21 and a lower connecting angle steel 22. The bottom end of each long angle steel column 21 is welded with a lower connecting plate 23 that is adapted to the upper connecting plate 15. Each lower connecting plate 23 is provided with a second lower internal thread hole corresponding to the second upper internal thread hole. The lower connecting angle steel 22 is welded to the upper end of the long angle steel column 21 so that the lower connecting angle steel 22 and the upper end of the long angle steel column 21 form a lower rectangular cylinder. The top opening of each lower connecting angle steel 22 is blocked by a lower triangular sealing plate 24 that is adapted to the upper triangular sealing plate 17. Each lower triangular sealing plate 24 is provided with a first lower internal thread hole corresponding to the first upper internal thread hole. Each lower connecting angle steel 22 is provided with a fourth upper internal thread hole on both side plates.

[0034] like Figure 9 As shown, each corner support unit 3 includes a diagonal bracing angle steel 31. The two ends of the diagonal bracing angle steel 31 are respectively fixed with a top horizontal connecting plate 32 and a bottom vertical connecting plate 33. The top horizontal connecting plate 32 is provided with a third lower internal thread hole corresponding to the third upper internal thread hole, and the bottom vertical connecting plate 33 is provided with a fourth lower internal thread hole corresponding to the fourth upper internal thread hole.

[0035] The four lower universal units 2 of the steel structure of each floor are located below the four corners of the corresponding upper universal unit 1. The four upper triangular sealing plates 17 correspond to the four lower triangular sealing plates 24. The upper universal unit 1 and the four lower universal units 2 are fixedly connected by the first high-strength bolts and the corresponding first upper internal threaded holes and first lower internal threaded holes. The four corner bracing units 3 of the steel structure of each floor are arranged between the lower flanges of two opposite channel steel beams 13 and the four lower connecting angle steels 22. The length arrangement direction of the two opposite channel steel beams 13 is parallel to the long side of the floor slab 11. The top horizontal connecting plate 32 of the corner brace unit 3 is fixed to the channel steel beam 13 by means of the third high-strength bolt and the corresponding third upper internal thread hole and the third lower internal thread hole. The bottom vertical connecting plate 33 of the corner brace unit 3 is fixed to the corresponding lower connecting angle steel 22 by means of the fourth high-strength bolt and the corresponding fourth upper internal thread hole and the fourth lower internal thread hole. The lower connecting plate 23 of the upper building steel structure corresponds to the upper connecting plate 15 of the adjacent lower building steel structure. The fixed connection of the building steel structures of the two adjacent floors is achieved by means of the second high-strength bolt and the corresponding second upper internal thread hole and the second lower internal thread hole.

[0036] Principle Explanation: 1) In the critical connection area between the short angle steel column 12 and the channel steel beam 13, the additional upper connecting angle steel 14 and rectangular sealing plate 16 form a closed rectangular section between the short angle steel column 12 and the upper connecting angle steel 14. This transforms the original open joint, which is prone to warping, eccentricity, and assembly errors, into a closed joint with local high stiffness, shorter force transmission path, and more uniform stress distribution. 2) An upper connecting plate 15 and a lower connecting plate 23 with internal threaded load-bearing interfaces are installed between the upper and lower adjacent steel structures of the building. These are fixed with a second high-strength bolt to form a standard inter-story interface. This allows vertical pressure and inter-story shear force to be directly transmitted through the column end node area, instead of relying on the continuous stress distribution between the floor slab 11 and the floor. 1) Simplify the inter-floor structure, reduce redundant floor slabs 11, reduce self-weight and improve net space utilization; 2) Construct a unit-level triangular stability system through corner bracing units 3 to improve lateral stability during assembly and use; 3) Divide the steel structure of each floor into three standardized units: upper general unit 1, lower general unit 2, and corner bracing unit 3. This facilitates transportation. When in use, the upper general unit 1, lower general unit 2, and corner bracing unit 3 are prefabricated in the factory in advance. Then, multiple prefabricated upper general unit 1, multiple lower general unit 2, and multiple corner bracing units 3 are transported to the site. Finally, the upper general unit 1, multiple lower general unit 2, and corner bracing unit 3 are assembled with high-strength bolts to complete the construction of the temporary building steel structure system.

[0037] In practical implementation, an upper universal unit 1 is added below the lower universal unit 2 located in the bottom layer of the building's steel structure. The lower connecting plate 23 of the bottom layer of the building structure and the upper connecting plate 15 of the added upper universal unit 1 are fixed together by a second high-strength bolt with a second upper internal threaded hole and a second lower internal threaded hole. The addition of the upper universal unit 1 serves as the base plate of the bottom layer of the building's steel structure, improving the overall stability of the temporary building's steel structure.

[0038] In this specific implementation, such as Figure 10 As shown, the floor slab 11 includes an upper cement fiberboard 110, a lower cement fiberboard 111, and multiple cold-formed rectangular tubes 112 arranged side by side along the length direction. The two ends of each cold-formed rectangular tube 112 are respectively fixed to the inner side of the web of two oppositely arranged channel steel beams 13. The upper cement fiberboard 110 is fixed to the upper part of the multiple cold-formed rectangular tubes 112, and the lower cement fiberboard 111 is located at the lower part of the multiple cold-formed rectangular tubes 112, and the four end faces of the lower cement fiberboard 111 are respectively fixed to the inner side of the web of four channel steel beams 13. The structure of the floor slab 11 is specific and standardized.

[0039] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A prefabricated temporary building steel structure system, characterized in that, The steel structure includes a multi-story building. Each floor of the steel structure includes an upper general unit (1), four lower general units (2) and four corner bracing units (3). The upper general units (1), lower general units (2) and corner bracing units (3) are all prefabricated in advance. Each upper general unit (1) includes a rectangular floor slab (11), four short angle steel columns (12), four channel steel beams (13), four upper connecting angle steels (14), and four upper connecting plates (15). The four channel steel beams (13) are respectively welded to the four end faces of the floor slab (11), and their openings are all arranged facing the floor slab (11). The four short angle steel columns (12) are respectively located between two adjacent channel steel beams (13), and the openings of the four short angle steel columns (12) are all arranged facing the floor slab (11). The four upper connecting angle steels (14) are respectively welded to the upper ends of the four short angle steel columns (12), so that the upper ends of each upper connecting angle steel (14) and the corresponding short angle steel column (12) are connected. The upper rectangular cylinder is formed. The end of each channel steel beam (13) is welded to the corresponding outer wall of the corresponding upper connecting angle steel (14). The top opening of each upper rectangular cylinder is blocked by a fixed rectangular sealing plate (16). The upper surface of the rectangular sealing plate (16) is aligned with the top surface of the channel steel beam (13) to form a connecting corner. The top surface of each connecting corner is welded with an upper connecting plate (15). Each upper connecting plate (15) is provided with a second upper internal thread hole. The two ends of the lower flange of each channel steel beam (13) are provided with a third upper internal thread hole. The bottom end of each short angle steel column (12) is blocked by a fixed upper triangular sealing plate (17). Each upper triangular sealing plate (17) is provided with a first upper internal thread hole. Each lower general unit (2) includes a long angle steel column (21) and a lower connecting angle steel (22). The bottom end of each long angle steel column (21) is welded with a lower connecting plate (23) that is compatible with the upper connecting plate (15). Each lower connecting plate (23) is provided with a second lower internal thread hole corresponding to the second upper internal thread hole. The lower connecting angle steel (22) is welded to the upper end of the long angle steel column (21) so that the lower connecting angle steel (22) and the upper end of the long angle steel column (21) form a lower rectangular cylinder. The top opening of each lower connecting angle steel (22) is blocked by a lower triangular sealing plate (24) that is compatible with the upper triangular sealing plate (17). Each lower triangular sealing plate (24) is provided with a first lower internal thread hole corresponding to the first upper internal thread hole. Each lower connecting angle steel (22) is provided with a fourth upper internal thread hole on both side plates. Each corner bracing unit (3) includes a diagonal bracing angle steel (31). The two ends of the diagonal bracing angle steel (31) are respectively fixed with a top horizontal connecting plate (32) and a bottom vertical connecting plate (33). The top horizontal connecting plate (32) is provided with a third lower internal thread hole corresponding to the third upper internal thread hole, and the bottom vertical connecting plate (33) is provided with a fourth lower internal thread hole corresponding to the fourth upper internal thread hole. The four lower universal units (2) of the steel structure of each floor are located below the four corners of the corresponding upper universal unit (1). The four upper triangular sealing plates (17) correspond to the four lower triangular sealing plates (24). The upper universal unit (1) and the four lower universal units (2) are fixedly connected by the first high-strength bolts and the corresponding first upper internal threaded holes and first lower internal threaded holes. The four corner bracing units (3) of the steel structure of each floor are arranged between the lower flange of two opposite channel steel beams (13) and the four lower connecting angle steels (22). The length arrangement direction of the two opposite channel steel beams (13) is the same as the long side direction of the floor slab (11). Parallel, the top horizontal connecting plate (32) of the corner bracing unit (3) is fixed to the channel steel beam (13) by the third high-strength bolt and the corresponding third upper internal thread hole and the third lower internal thread hole. The bottom vertical connecting plate (33) of the corner bracing unit (3) is fixed to the corresponding lower connecting angle steel (22) by the fourth high-strength bolt and the fourth upper internal thread hole and the fourth lower internal thread hole. The lower connecting plate (23) of the upper building steel structure corresponds to the upper connecting plate (15) of the adjacent lower building steel structure. The fixed connection of the building steel structures of the two adjacent floors is achieved by the second high-strength bolt and the second upper internal thread hole and the second lower internal thread hole.

2. The prefabricated temporary building steel structure system according to claim 1, characterized in that, Below the lower universal unit (2) of the bottom floor steel structure, an upper universal unit (1) is also provided. The lower connecting plate (23) of the bottom floor steel structure and the upper connecting plate (15) of the added upper universal unit (1) are fixed together by the second high-strength bolt and the second upper internal thread hole and the second lower internal thread hole.

3. The prefabricated temporary building steel structure system according to claim 2, characterized in that, The floor slab (11) includes an upper cement fiberboard (110), a lower cement fiberboard (111), and multiple cold-formed rectangular tubes (112) arranged side by side along the length direction. The two ends of each cold-formed rectangular tube (112) are respectively fixed to the inner side of the web of two oppositely arranged channel steel beams (13). The upper cement fiberboard (110) is fixed to the upper part of the multiple cold-formed rectangular tubes (112), and the lower cement fiberboard (111) is located at the lower part of the multiple cold-formed rectangular tubes (112), and the four end faces of the lower cement fiberboard (111) are respectively fixed to the inner side of the web of four channel steel beams (13).

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